The reliability of achromatic displays is island‐dependent in nocturnal Storm Petrels

@article{Soravia2019TheRO,
  title={The reliability of achromatic displays is island‐dependent in nocturnal Storm Petrels},
  author={Camilla Soravia and Felipe Aguado-Gim{\'e}nez and Jes{\'u}s Miguel Avil{\'e}s},
  journal={Ibis},
  year={2019}
}
Nocturnal birds rely on achromatic visual signals to assess rivals and potential mates, but variation in the expression of these displays has been understudied. Here we use UV‐visible reflectance spectrometry to study colour variation and the potential signalling function of the dark brown chest and white rump plumage – a colour pattern conspicuously exhibited during twilight courtship displays – in nocturnal Mediterranean Storm Petrels Hydrobates pelagicus melitensis from three islands with… 

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